Sink



FIG. 1 is a perspective view taken from the top, front, and right side of a sink showing my new design;

FIG. 2 is a perspective view taken from the top, front, and left side thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom view thereof

FIG. 5 is a front side view thereof;

FIG. 6 is a rear side view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a perspective view taken from the top, front, and left side of a second embodiment of a sink showing my new design;

FIG. 10 is a perspective view taken from the top, front, and right side thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a front side view thereof;

FIG. 14 is a rear side view thereof;

FIG. 15 is a left side view thereof; and,

FIG. 16 is a right side view thereof.

The broken lines disclosing a sink flange and an opening for preventing overflow are for illustration purposes only and form no part of the claimed design. 

The ornamental design for a sink, as shown and described. 